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WO1995009002A1 - Methode d'inhibition de la phagocytose - Google Patents

Methode d'inhibition de la phagocytose Download PDF

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Publication number
WO1995009002A1
WO1995009002A1 PCT/US1994/011108 US9411108W WO9509002A1 WO 1995009002 A1 WO1995009002 A1 WO 1995009002A1 US 9411108 W US9411108 W US 9411108W WO 9509002 A1 WO9509002 A1 WO 9509002A1
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Prior art keywords
receptor
cells
cell
sequence
immune complexes
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PCT/US1994/011108
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English (en)
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Alan D. Schreiber
Jong-Gu Park
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University Of Pennsylvania
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Priority to CA2172392A priority Critical patent/CA2172392C/fr
Priority to AU79244/94A priority patent/AU701919B2/en
Priority to EP94929970A priority patent/EP0723455B1/fr
Priority to DE69432472T priority patent/DE69432472D1/de
Priority to AT94929970T priority patent/ATE236650T1/de
Priority to JP7510472A priority patent/JPH09506072A/ja
Publication of WO1995009002A1 publication Critical patent/WO1995009002A1/fr

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    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
    • C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
    • C07K14/705—Receptors; Cell surface antigens; Cell surface determinants
    • C07K14/70503—Immunoglobulin superfamily
    • C07K14/70535—Fc-receptors, e.g. CD16, CD32, CD64 (CD2314/705F)
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P11/00—Drugs for disorders of the respiratory system
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P17/00—Drugs for dermatological disorders
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P19/00—Drugs for skeletal disorders
    • A61P19/02—Drugs for skeletal disorders for joint disorders, e.g. arthritis, arthrosis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P37/00—Drugs for immunological or allergic disorders
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P37/00—Drugs for immunological or allergic disorders
    • A61P37/02—Immunomodulators
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P7/00—Drugs for disorders of the blood or the extracellular fluid
    • A61P7/06—Antianaemics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K38/00—Medicinal preparations containing peptides
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K48/00—Medicinal preparations containing genetic material which is inserted into cells of the living body to treat genetic diseases; Gene therapy

Definitions

  • the present invention relates, in general, to methods of treating diseases resulting from
  • the present invention relates to methods of modulating the clearance of antibody-coated cells, viruses, or soluble antigens by inhibiting
  • the invention also relates to the moduclation of those immune reactions for which the reaction of antigen-antibody complexes with Fc
  • Certain immunological disorders are characterized by a disturbance in the expression of monocyte or macrophage Fc (IgG) receptors.
  • An increase in the number of Fc receptors can result from an increase in the level of Fc receptor mediators such as gamma interferon or infection or the release of bacterial products.
  • a decrease in the number of Fc receptors that can bind IgG can result not only from a reduction in the actual number of functional receptors but also from the saturation of Fc receptors by immune
  • autoimmune diseases such as systemic lupus erythematosus
  • levels of circulating immune complexes can be high and thus receptor
  • autoimmune diseases the body's mechanisms for distinguishing between itself and foreign invaders malfunction.
  • the body begins to make antibodies to certain parts of itself; these antibodies trigger the immune system which then destroys the tissue identified by the abnormal antibodies.
  • autoimmune hemolytic anemias represent a group of disorders in which individuals produce
  • erythrocytes to one or more of their own erythrocyte membrane antigens. Coating of erythrocytes by the abnormal antibodies is followed by their clearance from the circulation by splenic macrophages and subsequent destruction in the spleen.
  • Representative diseases in this class are immune hemolytic anemia, immune
  • autoimmune disease Another type of autoimmune disease is the type
  • rheumatoid arthritis In these diseases, chronic inflammation is present in the joints, tendons, kidneys, lung, heart and other organs. In rheumatoid arthritis, for example, breakdown of joint cartilage into the synovial fluid of the joint is present in later stages of the disease. In systemic lupus
  • Fc receptors recognition of these complexes in tissues by cells having Fc receptors initiates or increases tissue destruction by macrophages and possibly other cells such as polymorphonuclear leukocytes in these tissues. Reaction with these Fc receptors initiates a range of immune-associated reactions that may harm body tissues in proximity to these Fc receptor bearing cells.
  • receptors are often treated with corticosteroids, or immunosuppressants. These treatments can have diverse and serious side effects.
  • the present invention offers alternative treatment approaches that can be used alone or in combination with more conventional drug
  • the present invention relates to a method of preventing the phagocytosis of immune complexes (eg IgG-containing immune complexes) and/or the release of intracellular biologically active products by cells interacting with immune complexes.
  • An example of the present method comprises introducing into phagocytic cells of the mammal that are in contact with the immune complexes (eg, IgG-containing immune complexes) an inhibitor of a kinase endogenous to the cells that activates an Fc receptor present at the membrane of the cells.
  • the present invention relates to a method of preventing the clearance of immune complexes (eg, IgG-containing immune complexes) from a mammal that comprises introducing into
  • hematopoietic cells eg phagocytic cells
  • the immune complex eg phagocytic cells of the mammal that are in contact with the immune complexes a molecule that specificially prevents Fc receptor expression at the membrane of the cells.
  • the present invention relates to a method of inhibiting the binding of immune complexes (eg, IgG-containing immune complexes) present in a mammal to membrane-bound Fc receptors.
  • the method comprises introducing into the mammal a soluble Fc receptor that competes with the membrane-bound Fc receptor for binding to the immune complex.
  • the introduction is effected under conditions such that binding of the immune complex to the membrane-bound Fc receptor is inhibited.
  • the present invention relates to a method of inhibiting the phagocytic potential of a mammalian cell bearing an Fc receptor.
  • the method comprises introducing into the cell a construct comprising, in the 5'-3' direction of
  • transcribed strand of which comprises a sequence complementary to endogenous mRNA encoding the Fc receptor
  • a termination sequence functional in the cell iii) a termination sequence functional in the cell.
  • the construct is introduced under conditions such that the complementary strand is transcribed and binds to the endogenous mRNA thereby reducing
  • Figure 1 shows a schematic representation of
  • Fc ⁇ RIIIA ⁇ wild type and mutants Shown above the schematic diagram of the ⁇ chain are signal sequence (S), external peptides (E), transmembrane domain (TM), and cytoplasmic domain (CY).
  • S signal sequence
  • E external peptides
  • TM transmembrane domain
  • CY cytoplasmic domain
  • the expanded area shows an area of the nucleotide sequence of the ⁇ chain containing the conserved motif.
  • the murine ⁇ chain is shown.
  • the conserved amino acids of the gene family of the ⁇ and ⁇ chain genes are denoted by the underline.
  • the N-proximal tyrosine encoded by the TAC codon of the nucleotides 235-237 (Ra et al, J. Biol. Chem.
  • FIGS 2A and 2B show binding and phagocytosis of IgG-sensitized RBCs (EA) by transfected COS-1 cells. Binding of EA by transfected COS-1 cells (left panel: A, C, E and G). Phagocytosis of EA by transfected COS-1 cells (right panel; B, D, F, and H). (A) and (B) : binding and phagocytosis of COS-1 cells transfected with Fc ⁇ RIIIA ⁇ and wild type ⁇ . Three of the
  • phagocytosed RBCs shown with wild type ⁇ are marked by arrows in Figure (B), (C) and (D): transfectants containing ⁇ and ⁇ (MIA).
  • Figure 3 shows tyrosine phosphorylation of the wild type and mutant ⁇ chains by in vi tro kinase assay.
  • the ⁇ chain was immunoprecipitated with anti- ⁇ antisera from lysates of COS-1 transfectants.
  • vi tro kinase assay The ⁇ chain was immunoprecipitated with anti- ⁇ antisera from lysates of COS-1 transfectants.
  • phosphorylated samples were run on a 12.5% reducing SDS-PAGE gel. The gel was treated with IN KOH to remove phosphoserine and threonine, dried and the autoradiogram was examined after 4 days.
  • lane 1 Sham transfectants with Fc ⁇ RIIIA- ⁇ and pSVL vector without ⁇ cDNA insert
  • lanes 2 Fc ⁇ RIIIA ⁇ + wild type human ⁇ .
  • lane 3 Fc ⁇ RIIIA ⁇ + wild type mouse ⁇ .
  • lane 4 Fc ⁇ RIIIA ⁇ + MIA.
  • lane 5 Fc ⁇ RIIIA ⁇ + M2A.
  • lane 6 Fc ⁇ RIIIA ⁇ + DMA.
  • the phosphorylated ⁇ chains are denoted by an arrow (shown on the lower right side). The arrow with an asterisk (shown on the upper right side) is a specific tyrosine phosphoprotein band at approximately 40 kDa.
  • Figures 4A-4D are a Ca 2+ mobilization following Fc ⁇ RIIIA stimulation. Measurement of [Ca 2+ ]i in individual cells was carried out during crosslinking of Fc ⁇ RIIIA. The time points when anti-Fc ⁇ RIII mAb, epinephrine (positive control) and calcium ionophore were added are denoted by arrows in each figure.
  • transfectants were greatly decreased compared to WT transfectants.
  • the present invention relates, at least in part, to methods of modulating the clearance from a mammal (eg, from the circulation of a mammal) of antibody-coated cells.
  • the invention provides methods of treating immunologic disorders, such as autoimmune diseases, characterized by interactions of immune complexes (eg, IgG-containing immune complexes) with Fc receptors (for example, those present on the surface of macrophage), and immune mediated diseases such as asthma.
  • the methods of the invention result in Fc receptor expression and/or function being altered so that phagocytosis of IgG antibody-coated cells is reduced.
  • the invention provides methods of inhibiting Fc receptor function by inhibiting the phosphorylation of Fc receptor components that is required for phagocytic signal transduction and by introducing into the circulation soluble Fc receptors that compete with the membrane bound receptor for immune complex (eg, IgG-containing immune complex) binding.
  • the invention also provides a method of inhibiting expression of Fc receptors by introducing into receptor-producing cells Fc receptor antisense constructs.
  • the invention also provides methods of degrading Fc receptor RNA using, for example,
  • the present invention relates to a method of preventing ingestion (eg phagocytosis) of immune complexes (eg IgG-coated cells) by inhibiting phosphorylation of core sequences within the
  • cytoplasmic domains of the ⁇ and C chains of FcRIIIA is required for phagocytic signal transduction (the numbers following the letter X denote the number of amino acids at that position; X can be any amino acid but X2 within a Y-X2-L is preferably the amino acids present in a Y-X2-L sequence of the cytoplasmic domain of Fc ⁇ RIIA or the ⁇ chain of Fc ⁇ RIII). It appears that the second Y-X2-L of these core sequences (motifs) is particularly important for phagocytosis.
  • the present invention contemplates the introduction into target cells of an inhibitor of the kinase(s) responsible for phosphorylation. In a specific embodiment, the
  • inhibitor is a peptide that includes a sequence similar to, if not identical to, at least a functional portion of a tyrosine-containing motif (note, for example, the underlined portions of the motifs set forth above) and thus serves as a competitive inhibitor of the
  • the inhibitor can take the form of an Fc receptor devoid of the extracellular domain or devoid of the extracellular and transmembrane domains.
  • the inhibitor can be
  • phosphorylation competitively or non-competitively eg, a mimetic of the active peptide can be used having a structural conformation similar to the binding site of the active peptide.
  • the sequences of the ⁇ chain of Fc ⁇ RI necessary for mediator release eg, histamine, cytokines and leukotrienes
  • mediator release eg, histamine, cytokines and leukotrienes
  • the peptide inhibitor of the invention can be introduced into target cells directly, for example, using liposomes.
  • liposomes See also approaches described in Science 26:1877 (1993) for administration of peptides modified so as to render them capable of crossing cellular lipid membranes.
  • a DNA sequence encoding the peptide inhibitor can be introduced using gene therapy protocols so that the peptide is produced intracellularly.
  • the inhibitor or inhibitor encoding sequence can be administered to the cells of the lung, including macrophages, in the form of an aerosol.
  • the inhibitor or inhibitor encoding sequence can be present in the aerosol as a particle (e.g. liposome, or non-infectious bacteria, for example, Listeria, in the case of the encoding sequence) that is phagocytosed by the particle.
  • Viral vectors can also be used to introduce the peptide inhibitor encoding sequence of the invention into cells of the pulmonary tree.
  • the vectors can be introduced as an aerosol and can take the form of a replication defective herpes or adenoviral vector. Retroviral vectors can also be used. (See, generally, Bajocchi et al, Nat. Genet. 3:229 (1993); Lemarchand et al, Circ. Res., 72:1132 (1993); Ram et al, Cancer Res. 53:83 (1993); Crystal, Am. J. Med.
  • Blood monocytes can be transformed (infected) ex vivo with the peptide inhibitor encoding sequence of the invention and then reintroduced into the patient so that the inhibitor is produced in vivo .
  • phosphorylation involves the use of ribozymes that recognize RNA sequences specifying Fc receptor
  • ribozyme can be effected using a carrier such as a liposome coated with IgG so as to direct insertion to Fc ⁇ receptor bearing cells.
  • IgE-coated liposomes can be used to direct the ribozyme to mast cells or basophiles, or cells of that lineage, bearing the IgE receptor Fc ⁇ RI with its associated ⁇ subunit.
  • the ⁇ subunit of the IgE receptor is responsible for transmitting the signal inducing the release of intracellular mediators by mast cells .
  • the destruction of the ⁇ chain RNA is predicted to inhibit the release of these bioactive products.
  • ribozymes administered as described would bind to a few selected sequences (eg, RNA splicing and 5' untranslated sequences for which they were specific, for example, in Fc ⁇ RIIA RNA or Fc ⁇ RIIIA ⁇ chain RNA) and the enzymatic activity associated with the ribozyme would result in digestion and thus removal of the RNA specifying functional sequences of the receptor necessary for phagocytic signal transduction.
  • RNA sequences specifying the sequences of the ⁇ chain of Fc ⁇ RI necessary for mediator release eg, histamine, cytokines and leukotrienes
  • phosphorylation involves the use of an antisense construct or ribozyme that targets Syk encoding
  • the Syk gene product but not the gene product of ZAP-70 of the Syk kinase family, has been shown to stimulate Fc ⁇ RI and Fc ⁇ RIIIA phagocytosis mediated by both the ⁇ and ⁇ chains.
  • Syk dependent phosphorylation can be effected.
  • Constructs and ribozymes suitable for use in this method can be readily selected by one skilled in the art (see Yagi et al, Biochem. Biophys. Res. Comm. 200:28 (1994) for Syk gene sequence).
  • the present invention relates to a method of inhibiting the interaction between immune complexes (eg, IgG-containing immune complexes) and membrane-associated Fc receptors and thereby suppressing the clearance of such complexes by phagocytosis (alternatively, the signalling through the Fc receptor resulting in the release of intracellular mediators).
  • the method involves introducing into the circulation a soluble form of the Fc receptor that competes with the membrane bound form for immune complex binding. Transcripts of certain soluble forms have been identified in cells of megakaryocytic and monocyte/myeloid lineages (Rappaport et al, Exp.
  • the present invention contemplates the production and use of soluble Fc receptors that include an extracellular domain alone or in combination with a cytoplasmic domain. Suitable receptors are capable of competing with membrane bound Fc receptors for binding of IgG-coated cells.
  • Soluble receptors of the invention can take the form of Fc ⁇ RI, Fc ⁇ RII or Fc ⁇ RIII extracellular domains alone or binding portions thereof (alternatively, a soluble receptor of Fc ⁇ RI can be employed taking the form of an extracellular domain alone or binding portion thereof). As noted above, cytoplasmic domains, or portions thereof, can also be present.
  • Fc ⁇ RIIA Fc ⁇ RIIA, respectively, and where ⁇ and ⁇ correspond to the ⁇ and ⁇ chains of Fc ⁇ RIII, the first designation indicating the source of the extracellular domain and the second the source of the cytoplasmic domain: I:I, I, IIA, IIA:IIA, I: IIA, ⁇ : ⁇ , ⁇ , ⁇ :IIA, I: ⁇ .
  • Soluble receptors depending on their nature, can be prepared chemically or recombinantly (Horton et al, Biotechniques 8:528 (1990)).
  • the soluble receptors can be administered systemically or to the lung as
  • the present invention relates to a method of inhibiting Fc receptor
  • an antisense construct comprising, in the 5'-3' direction of transcription: i) a promoter functional in the cells, ii) a segment of double-stranded DNA, the transcribed strand of which includes a sequence complementary to the endogenous mRNA of the Fc receptor the expression of which is to be inhibited, and iii) a termination sequence functional in the host cells.
  • This embodiment of the invention makes it possible to regulate the expression of a specific Fc receptor in cells producing multiple receptor classes. This specificity can be achieved by selecting for inclusion in the DNA segment ((ii) above) sequences unique to the mRNA of the endogenous Fc receptor.
  • sequence complementary to the endogenous Fc receptor mRNA is at least 15 nucleotides in length, preferably, at least 30 and, most preferably, at least 50.
  • the sequence is typically less than 5000
  • nucleotides in length preferably less than 2000, and most preferably less than 1000.
  • sequence can be complementary to a translated or untranslated region of the mRNA (see, for example, McKenzie et al, Molec.
  • antisense construct for example, to the lung and to the spleen, can be carried out as described above using both in vivo and ex vivo transformation protocols.
  • antisense transcript itself can be introduced directly into the target cells using methods known in the art, including those described above.
  • the present invention also relates to a method of effecting inhibition by introducing into a cell having phagocytic potential Fc ⁇ RIIB (eg Fc ⁇ RIIB2), which is capable of inhibiting the function of Fc ⁇ receptors, including Fc ⁇ RIIA.
  • Fc ⁇ RIIB eg Fc ⁇ RIIB2
  • Introduction of Fc ⁇ RIIB can be effected by transfecting/transforming a target cell with a construct comprising a sequence encoding Fc ⁇ RIIB, or portion thereof that effects the inhibition (Brooks et al, J. Exp. Med. 170:1369 (1989); Indik et al, Blood 83:2072 (1994)).
  • Suitable constructs can be selected by one skilled in the art.
  • Recombinant soluble Fc ⁇ RIII proteins can be produced using expression vectors as described below.
  • the soluble protein can correspond to Fc ⁇ RIII with the transmembrane domain removed.
  • the constructs can be introduced into mammalian cells under conditions such that expression of the receptor encoding sequence occurs.
  • the recombinant proteins thus produced are isolated both from the cell lysates and from the supernatants.
  • Transfection of adherent cells or cells in suspension Transfection of adherent cells, eg, CHO cells or COS cells, or an appropriate suspension cell system will be performed. Permanent transfectants expressing soluble forms of Fc ⁇ receptor will be established by
  • Transfected cells will be allowed to grow 48 hours and selected in media containing Geneticin at 2 mg/ml (Gibco BRL, Gaithersburg, Maryland) or other selection drug. After approximately twelve weeks, positive colonies will be isolated and expanded for further characterization of the clones. The isolated clones will be examined by enzyme-linked immunoassay (ELISA) using ELISA plates (Dynatech, Alexandria, Virginia) to select a transfectant cell line expression the highest quantity of the soluble receptor. Mass culture of adherent transfectants will be achieved by employing the hollow-fiber tissue culture system.
  • ELISA enzyme-linked immunoassay
  • soluble Fc ⁇ RIII proteins are assessed both in vi tro and in vivo .
  • the effect of soluble Fc receptors on IgG-immune complex binding to cellular membrane-bound receptors depends on several factors including the local concentrations of the ligand and soluble receptor, the surface density of the membrane-bound receptor, the valence of the ligand and the relative affinities of the two receptor forms for ligand.
  • the limiting factors in the interaction of soluble Fc ⁇ RIII receptors with ligand and cellular membranes can be deciphered using available model systems.
  • the in vi tro assay systems rely on the competition of soluble receptors with cell membrane receptors for labeled IgG ligand and IgG-coated erythrocytes (EA). Fc ⁇ receptor-negative cells are transfected with transmembrane Fc ⁇ RIII molecules that retain the
  • Fc ⁇ RIII is also examined in vivo .
  • an established experimental animal model is used to study whether soluble Fc ⁇ RIII administered in vivo alters the clearance of antibody coated cells (Ruiz and Schreiber, J. Clin. Invest. 88:149 (1991)).
  • the immunoregulatory potential of soluble Fc ⁇ RIII is examined in this manner.
  • the pSVL eucaryotic expression vector (Pharmacia LKB, Piscataway, NJ) was employed for expression of Fc ⁇ RIIIA in COS-1 cells.
  • huFc ⁇ RIIIA ⁇ cDNA was cloned into the Xbal and BamHI cloning sites of pSVL.
  • muFc ⁇ RIIIA ⁇ cDNA was cloned into Xhol and BamHI cloning sites.
  • TCR/Fc ⁇ RIIIA ⁇ was cloned into the Xbal and BamHI cloning sites of pSVL.
  • the transfection buffer containing DNA was added to COS-1 cells with incubation for 4 hours at 37°C. Cells were then shocked with 10% DMSO in phosphate buffered saline (PBS) for 2 minutes, washed twice with DMEM and grown in NuSerum supplemented DMEM. Cells were studied 48 hours following transfection.
  • PBS phosphate buffered saline
  • Transfected cells were harvested with staining buffer (PBS containing 0.02 % sodium azide and 0.1% BSA) using transfer pipettes. Cells were
  • EA Sterile sheep red blood cells (10 9 /ml) in calcium and magnesium-free PBS were sensitized by incubation with an equal volume of a subagglutinating titer of rabbit anti-sheep RBC antibody (Cappel
  • RBCs (EA) were washed twice with PBS and resuspended to a final concentration of 10 9 /ml for overlaying on transfected COS-1 cells. Cells were examined for rosetting ( ⁇ 10 EA per COS-1 cell) and phagocytosis as described previously (Indik et al, J. Clin. Invest.
  • COS-1 cells bound with EA (after three washings) were subjected to a brief hypotonic shock (35 seconds) with hypotonic PBS to remove surface bound EA. The cells were then stained with Wright-Giemsa staining
  • Inhibitors of phosphatases and proteases (ImM EGTA, 1 mM Na orthovanadate, 1 mM PMSF, 10 ⁇ g/ml aprotinin, 50 ⁇ g/ml leupeptin, and 100 ⁇ g/ml soybean trypsin inhibitor) were added fresh to lysis buffer. After 15 minutes of lysis on ice, cell lysates were centrifuged for 30 minutes at 4°C to clarify. The
  • Fc ⁇ RIIIA- ⁇ chain was immunoprecipitated with anti-human ⁇ antiserum (provided by Jean-Pierre Kinet, NIAID-NIH, Rockville, MD) and Protein A-sepharose CL4B (Signa, St. Louis, MO) in lysis buffer. Pellets were washed three times in lysis buffer and once in low salt buffer (100 mM NaCl, 25 mM Hepes, pH 7.4 and 5 mM MnCl 2 ).
  • Pellets were incubated (20°C, 10 min.) with 30 ⁇ l of a mixture containing 25 mM Hepes, pH 7.4, 5 mM MnCl 2 , 5 mM p-nitrophenyl-phosphate, 1 ⁇ M cold ATP (Boehringer
  • COS-1 cells plated on glass coverslips were incubated with 2 ⁇ M Fura-2/AM (Calbiochem. San Diego, CA) for 30 minutes, washed twice and the coverslips then
  • Fc ⁇ RIIIA receptors were crosslinked either with biotinylated anti-Fc ⁇ RIII followed by the addition of streptavidin or with anti-Fc ⁇ RIII mAB 3G8 whole IgG.
  • 10 ⁇ M epinephrine was added to crosslink epinephrine receptors expressed on COS cells.
  • Calcium imaging was performed using a 40x fluorescence objective on a Nikon Diaphot microscope with the image- 1 AT quantitative fluorescence system (Universal
  • 340/380 ratio images were calculated on a pixel by pixel basis and the average 340/380 ratio within each cell determined at each time point. 340/380 ratios were converted to [Ca 2+ ]i based on solution
  • FMI mean fluorescence intensity
  • cotransfected cells stained with anti-Fc ⁇ RIII mAB increased by 15 fold compared to cells stained with an IgG isotype control or compared to mock-transfected cells stained with anti-Fc ⁇ RIII mAB (Table 1).
  • the transfectants were examined for their ability to bind and phagocytose IgG sensitized RBCs (EA).
  • results summarized in Table 2 are as follows: M1 ⁇ mutants showed more than 99% reduction in phagocytic activity as shown by phagocytic index (PI) ( ⁇ 1 % of transfectants with ingested EA and minimal ingested EA per phagocytosing cell) (p ⁇ 0.02); M2 and DM ⁇ mutants demonstrated essentially no phagocytosis (1 among 5000 cells examined) (Table 2, Fig. 2).
  • PI phagocytic index
  • the in vi tro kinase assay demonstrated a distinct band of approximately 40 kDa present in all lanes except the sham transfectants. This band may represent an associated phosphoprotein coprecipitating with ⁇ .
  • Fc ⁇ RIII in its native state on pulmonary macrophage or cultured monocytes (M) was examined in order to study the physiologically relevant protein tyrosine kinases (PTK) and phosphotyrosine containing substrates during macrophage signal transduction.
  • PTK protein tyrosine kinases
  • Fab antibody Western blot analysis revealed a characteristic pattern of
  • Phosphotyrosine patterns were indistinguishable in fresh macrophage and cultured monocytes, validating the latter as a useful in vi tro model.
  • P62 a protein associated with p120 ras GAP, although not GAP itself, was identified by specific immunoprecipitation as one of these phosphotyrosine substrates.
  • a second substrate was found to be p95 vav , a hematopoietic oncogene product which is also tyrosine phosphorylated after TCR, slg and Fc ⁇ RI activation.
  • the kinase PTK72/Syk heretofore identified only in B cell slg and mast cell Fc ⁇ RI signaling, was also a major phosphotyrosine substrate after macrophage

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Abstract

L'invention porte en général sur des méthodes de traitement de maladies résultant d'interactions entre des complexes immunitaires et des récepteurs du fragment Fc, et en particulier sur des méthodes de modulation du retrait, de la circulation, de cellules enrobées d'anticorps, par inhibition de la phagocytose, et sur des méthodes de modulation de l'interaction de complexes immunitaires avec les récepteurs tissulaires du fragment FC. L'invention porte également sur des méthodes de modulation de l'activation de processus immunologiques induits par l'activation des récepteurs du fragment Fc résultant de l'interaction anticorps-antigène/récepteur.
PCT/US1994/011108 1993-09-30 1994-09-30 Methode d'inhibition de la phagocytose WO1995009002A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CA2172392A CA2172392C (fr) 1993-09-30 1994-09-30 Methode d'inhibition de la phagocytose
AU79244/94A AU701919B2 (en) 1993-09-30 1994-09-30 Methods of inhibiting phagocytosis
EP94929970A EP0723455B1 (fr) 1993-09-30 1994-09-30 Methode d'inhibition de la phagocytose
DE69432472T DE69432472D1 (de) 1993-09-30 1994-09-30 Verfahren zur hemmung der phagozytose
AT94929970T ATE236650T1 (de) 1993-09-30 1994-09-30 Verfahren zur hemmung der phagozytose
JP7510472A JPH09506072A (ja) 1993-09-30 1994-09-30 食作用を阻害する方法

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US12938193A 1993-09-30 1993-09-30
US129,381 1993-09-30

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EP (1) EP0723455B1 (fr)
JP (2) JPH09506072A (fr)
AT (1) ATE236650T1 (fr)
AU (1) AU701919B2 (fr)
CA (1) CA2172392C (fr)
DE (1) DE69432472D1 (fr)
IL (1) IL111105A (fr)
WO (1) WO1995009002A1 (fr)

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JPH11507824A (ja) * 1995-06-07 1999-07-13 ユニバーシティー・オブ・ペンシルバニア 食作用を阻害する方法
WO1999041285A1 (fr) * 1998-02-17 1999-08-19 Medarex, Inc. Traitement et diagnostic des maladies dues aux macrophages au moyen des ligands des recepteurs de fc
EP1006183A1 (fr) * 1998-12-03 2000-06-07 Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. Récepteurs Fc recombinantes et solubles
US6638764B2 (en) 1993-09-30 2003-10-28 University Of Pennsylvania Methods of inhibiting phagocytosis
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US7192615B2 (en) 2001-02-28 2007-03-20 J&J Consumer Companies, Inc. Compositions containing legume products
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US7985404B1 (en) 1999-07-27 2011-07-26 Johnson & Johnson Consumer Companies, Inc. Reducing hair growth, hair follicle and hair shaft size and hair pigmentation
US8039026B1 (en) 1997-07-28 2011-10-18 Johnson & Johnson Consumer Companies, Inc Methods for treating skin pigmentation
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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6638764B2 (en) 1993-09-30 2003-10-28 University Of Pennsylvania Methods of inhibiting phagocytosis
US7148014B2 (en) 1993-09-30 2006-12-12 University Of Pennsylvania Methods of inhibiting phagocytosis
US5892023A (en) * 1995-05-26 1999-04-06 Societe De Conseils De Recherches Et D'applications Scientifiques (S.C.R.A.S.) Anti sense oligonucleotides for blocking IgE receptor synthesis
WO1996037605A3 (fr) * 1995-05-26 1996-12-27 Scras OLIGONUCLEOTIDES ANTISENS POUR BLOQUER LA SYNTHESE DU RECEPTEUR DE L'IgE
JPH11507824A (ja) * 1995-06-07 1999-07-13 ユニバーシティー・オブ・ペンシルバニア 食作用を阻害する方法
EP0831875A4 (fr) * 1995-06-07 2002-07-31 Univ Pennsylvania Procedes d'inhibition de la phagocytose
US8039026B1 (en) 1997-07-28 2011-10-18 Johnson & Johnson Consumer Companies, Inc Methods for treating skin pigmentation
WO1999041285A1 (fr) * 1998-02-17 1999-08-19 Medarex, Inc. Traitement et diagnostic des maladies dues aux macrophages au moyen des ligands des recepteurs de fc
US8106094B2 (en) 1998-07-06 2012-01-31 Johnson & Johnson Consumer Companies, Inc. Compositions and methods for treating skin conditions
US8093293B2 (en) 1998-07-06 2012-01-10 Johnson & Johnson Consumer Companies, Inc. Methods for treating skin conditions
US8666680B2 (en) 1998-12-03 2014-03-04 MAX-PLANCK-Gesellschaft zur Förderung der Wissenschaften e.V. Recombinant soluble FC receptors
US7074896B1 (en) 1998-12-03 2006-07-11 MAX-PLANCK-Gesellschaft zur Förderung der Wissenschaften e.V. Recombinant soluble Fc receptors
WO2000032767A1 (fr) * 1998-12-03 2000-06-08 MAX-PLANCK-Gesellschaft zur Förderung der Wissenschaften e.V. RECEPTEURS SOLUBLES DE RECOMBINAISON DU Fc
EP1006183A1 (fr) * 1998-12-03 2000-06-07 Max-Planck-Gesellschaft zur Förderung der Wissenschaften e.V. Récepteurs Fc recombinantes et solubles
US7985404B1 (en) 1999-07-27 2011-07-26 Johnson & Johnson Consumer Companies, Inc. Reducing hair growth, hair follicle and hair shaft size and hair pigmentation
US7309688B2 (en) 2000-10-27 2007-12-18 Johnson & Johnson Consumer Companies Topical anti-cancer compositions and methods of use thereof
US8431550B2 (en) 2000-10-27 2013-04-30 Johnson & Johnson Consumer Companies, Inc. Topical anti-cancer compositions and methods of use thereof
US7087585B2 (en) 2000-11-22 2006-08-08 The Trustees Of The University Of Pennsylvania Tripeptide of FcγRIIA
EP1346218A4 (fr) * 2000-11-22 2006-03-15 Univ Pennsylvania Tripeptide de fc gama riia
US7897144B2 (en) 2001-02-28 2011-03-01 Johnson & Johnson Comsumer Companies, Inc. Compositions containing legume products
US7192615B2 (en) 2001-02-28 2007-03-20 J&J Consumer Companies, Inc. Compositions containing legume products

Also Published As

Publication number Publication date
DE69432472D1 (de) 2003-05-15
EP0723455A1 (fr) 1996-07-31
JP2006217922A (ja) 2006-08-24
CA2172392A1 (fr) 1995-04-06
IL111105A (en) 2009-05-04
EP0723455A4 (fr) 1999-09-01
IL111105A0 (en) 1994-11-28
ATE236650T1 (de) 2003-04-15
CA2172392C (fr) 2011-06-21
EP0723455B1 (fr) 2003-04-09
AU7924494A (en) 1995-04-18
AU701919B2 (en) 1999-02-11
JPH09506072A (ja) 1997-06-17

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